81 lines
1.8 KiB
JavaScript
81 lines
1.8 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isObjectLike = require( '@stdlib/assert/is-object-like' );
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var hasOwnProp = require( '@stdlib/assert/has-own-property' );
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var isFunction = require( '@stdlib/assert/is-function' );
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// MAIN //
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/**
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* Sets a nested property.
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*
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* @private
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* @param {ObjectLike} obj - input object
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* @param {Array} props - list of properties defining a key path
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* @param {boolean} create - boolean indicating whether to create a path if the key path does not already exist
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* @param {*} val - value to set
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* @returns {boolean} boolean indicating if the property was successfully set
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*/
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function deepSet( obj, props, create, val ) {
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var bool;
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var len;
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var v;
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var p;
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var i;
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len = props.length;
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bool = false;
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v = obj;
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for ( i = 0; i < len; i++ ) {
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p = props[ i ];
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if ( isObjectLike( v ) ) {
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if ( !hasOwnProp( v, p ) ) {
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if ( create ) {
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v[ p ] = {};
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} else {
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break;
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}
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}
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if ( i === len-1 ) {
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if ( isFunction( val ) ) {
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v[ p ] = val( v[ p ] );
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} else {
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v[ p ] = val;
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}
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bool = true;
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} else {
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v = v[ p ];
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}
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} else {
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break;
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}
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}
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return bool;
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}
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// EXPORTS //
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module.exports = deepSet;
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